1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6882522ed5ef9bce40fd8e194bc24bef97d042c48a400834f47b97cc48952c67. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70619f66-8d79-4829-ac9f-752493615b53.json and https://artists.proofprofile.net/proofs/artist/70619f66-8d79-4829-ac9f-752493615b53.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce5b49aa4e39aabdcf98cfee59a515638a25f08930aa4182b2b395c8ffa65e3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6P2269699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc76bf409fc75bef57e3e0a9e5a85f871354152d7014c0ca7588265dd1f0a21. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWA32200184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd136e1fd71265525bc7b85f9c6569660e42443e15067fd5f40e9346fb9a498e4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ42229708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11dc4ff9588c390365c046bbd31e6a59f7ecfdbd149c9d621b253b0e4a3e892. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLD91747432.
Never Broke Again (feat. Shawny Binladen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eaf45ffa2c253fc4713c3900b16eded908ae9576bb642c4dafa1ab1c19f5a42. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT22400691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ecf37e0b912b7bbe3d50738b3519afd650b09edb90889e09bec62ab1dad49f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USAT22400693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614a78108eade4d20e552914a45179c8d5061a9b72fbba6df8b45eaa658051c2. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1493282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c9c1a2927cc8acd59dd52f37304995f0bb7aaeb8f1ac94941a8dbd908d3b6f. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEN2388775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79aa8d6e716efca69e65ec3b5d4c34e77da358c7b2254f107c1b6d719ddef71c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB62209545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdba1989f6b04f608e891729533e7361ceacc5c85ac190cafa467a886ff7628. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB62209550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08023a94ac7093e00b5a756a27fe033be464eae99e8080a0089001f8de3fb133. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWR2258078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdc762c0379ad5172b61d3c6c9835e96de3a59a16606ec53818c55334682bc3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWR2258079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a725387ecef85ad6b27689006ab8a97d2ec63fab804e8ab74911edf68cae861. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWR2258088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29a115cda5e3f8c1aa51acf9565f83ee831c1dc5b45a4ca3ab498983256f293. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMER2200842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29a115cda5e3f8c1aa51acf9565f83ee831c1dc5b45a4ca3ab498983256f293. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMER2200842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb07c5d9807635c65e2f5350cf481d14f84121cc7545f9da4eef54d6792d576. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6M2274568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62637322ba43f675c31bc86d756bfb97320dc6c76c09d14f51870300494f2058. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES72237113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28975432a5bec6c921b3118b2b1d2b96d749c2c3bb246751d190594a13fec330. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAU2141267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb44be79cba4eb7a50343a42439fff389fbb628d81dbf64b0c1321146f0aaad. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAS2136766.